H2V D3D Device Pointer

Old, but decided to post it since it's very informational!

Just did this tonight, found global static pointer to IDirect3dDevice9. It was pretty rough. Here's how I got it:
Opened halo 2 vista in ollydbg, searched for all Names, found references to Direct3DCreate9, call is here:

Quote:

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00CC3417 PUSH 20
00CC3419 CALL <JMP.&d3d9.Direct3DCreate9>
00CC341E MOV DWORD PTR DS:[149C640],EAX

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20 hex is 32 decimal:
#define D3D_SDK_VERSION 32
call would look like this:
IDirect3D9* pDirect3D9 = Direct3DCreate9(D3D_SDK_VERSION);
pDirect3D9 address would be 0x0149C640
So, from this, we know this address holds the pointer to the IDirect3d9 interface, which has a call to CreateDevice, which creates our device that has all the functions we need. In olly I searched for that constant address, because it has to store the pointer in a register before it can call CreateDevice. Looking at d3d9.h from the sdk, we can calculate what the offset would be.

Quote:

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QueryInterface 0
AddRef 1
Release 2
RegisterSoftwareDevice 3
GetAdapterCount 4
GetAdapterIdentifier 5
GetAdapterModeCount 6
EnumAdapterModes 7
GetAdapterDisplayMode 8
CheckDeviceType 9
CheckDeviceFormat 10
CheckDeviceMultiSampleType 11
CheckDepthStencilMatch 12
CheckDeviceFormatConversion 13
GetDeviceCaps 14
GetAdapterMonitor 15
CreateDevice 16

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So, index is 16, multiply that by 4 bytes, gives us 64 in decimal and 40 in heximal
We now know we need to look for *pDirect3D9 + 0x40. After digging, I found the CreateDevice call...

Quote:

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00CBE978 MOV EAX,DWORD PTR DS:[149C640]
00CBE97D MOV EDX,DWORD PTR DS:[EAX]
00CBE97F MOV EDX,DWORD PTR DS:[EDX+40]
00CBE982 PUSH halo2.0149C6B4
00CBE987 LEA ECX,DWORD PTR SS:[ESP+34]
00CBE98B PUSH ECX
00CBE98C MOV ECX,DWORD PTR DS:[143A8B0]
00CBE992 NEG ECX
00CBE994 SBB ECX,ECX
00CBE996 AND ECX,20
00CBE999 ADD ECX,20
00CBE99C OR ECX,106
00CBE9A2 PUSH ECX
00CBE9A3 MOV ECX,DWORD PTR DS:[ECD9C4]
00CBE9A9 PUSH ECX
00CBE9AA PUSH EDI
00CBE9AB PUSH ESI
00CBE9AC PUSH EAX
00CBE9AD CALL EDX

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Parameters are pushed last to first, and the first push here is a static memory address...hmm what is the last parameter in the CreateDevice call?: IDirect3DDevice9 ** ppReturnedDeviceInterface
AWESOME. We now have a global static address that stores the device pointer...and will never change unless they update the game, which will probably never happen.
0x0149C6B4 is the device pointer address.
Example usage:

Quote:

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IDirect3DDevice9*** g_pH2VDevice = (IDirect3DDevice9***)0x0149C6B4;
IDirect3DDevice9* g_pDevice = (IDirect3DDevice9*)**g_pH2VDevice;
g_pDevice->DrawIndexedPrimitive();

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have fun
EDIT: It's only static from the module base, cuz when I tried hooking last night it wouldn't work, it changed. So above you have to get halo2 base then add the result to
0x00A3C6B4, ex:
DWORD Base = (DWORD)GetModuleHandle("halo2.exe");
DWORD DeviceOffset = 0x00A3C6B4;
IDirect3DDevice9*** pH2VDevice = (IDirect3DDevice9***)(Base + DeviceOffset);

now in english?

It does stuff. Post processing stuff mb?

haha. The Direct3d device basically is a huge collection of functions needed to render the graphics you see in games. Halo, like all games, must create an instance of the d3d device and it stores a pointer(address) that points to the list of device functions. Once you have this device pointer, you can hijack/detour these functions. OS does this, but a different method than what I posted above. OS hijacks the entire device before it is even created! :downs:

i'm impressed but hopelessly confused.
keep up the good work and dont bother trying to dum it down for the likes of me, talk to km about it :)

is this something to do with multiple-instances of halo2.exe? :ugh:
I couldn't help wondering, someone claims he's done it, and I see this...

Quote:

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Originally Posted by Shock120

is this something to do with multiple-instances of halo2.exe? :ugh:
I couldn't help wondering, someone claims he's done it, and I see this...

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No, I think that's supersniper. This is the Direct3D graphics API. It has nothing to do with multi-instances of Halo, only finding the device pointer.

Quote:

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Originally Posted by Skarma

No, I think that's supersniper. This is the Direct3D graphics API. It has nothing to do with multi-instances of Halo, only finding the device pointer.

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got anything new up your sleeves? :neckbeard:

No I didn't claim I did it, Kiwi got multi-instances of halo 2 working.
I'm just trying to fiddle around with it to see if it won't overkill your gfx card.

I might pick up a copy of h2v and mod that if/when my current project with abyll comes to fruition. But then again, i want to be able to use a proper ek.

Make our own mb? (lol)

Quote:

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Originally Posted by supersniper

No I didn't claim I did it, Kiwi got multi-instances of halo 2 working.
I'm just trying to fiddle around with it to see if it won't overkill your gfx card.

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Would be awesome if you could configure two cards in SLI or CrossFire to each run one instance of the game. Still, what's the point if there is no Co-op. It's a decent game, but just go play some FireFight with some friends.

Quote:

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Originally Posted by Amit

Would be awesome if you could configure two cards in SLI or CrossFire to each run one instance of the game. Still, what's the point if there is no Co-op. It's a decent game, but just go play some FireFight with some friends.

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No.
this one will do the job.

Nice i will fiddle with it a bit later. TY. +ReP